我在github上找到了这个:

// usage: log('inside coolFunc', this, arguments);
// paulirish.com/2009/log-a-lightweight-wrapper-for-consolelog/
window.log = function f() {
    log.history = log.history || [];
    log.history.push(arguments);
    if (this.console) {
        var args = arguments,
            newarr;
        args.callee = args.callee.caller;
        newarr = [].slice.call(args);
        if (typeof console.log === 'object') log.apply.call(console.log, console, newarr);
        else console.log.apply(console, newarr);
    }
};

// make it safe to use console.log always
(function(a) {
    function b() {}
    for (var c = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(","), d; !! (d = c.pop());) {
        a[d] = a[d] || b;
    }
})(function() {
    try {
        console.log();
        return window.console;
    } catch(a) {
        return (window.console = {});
    }
} ());

假设你不关心提醒的备用方法，这里有一个更简洁的方法来解决ie的缺点:

var console=console||{"log":function(){}};

对于没有控制台的浏览器来说，最好的解决方案是:

// Avoid `console` errors in browsers that lack a console.
(function() {
    var method;
    var noop = function () {};
    var methods = [
        'assert', 'clear', 'count', 'debug', 'dir', 'dirxml', 'error',
        'exception', 'group', 'groupCollapsed', 'groupEnd', 'info', 'log',
        'markTimeline', 'profile', 'profileEnd', 'table', 'time', 'timeEnd',
        'timeStamp', 'trace', 'warn'
    ];
    var length = methods.length;
    var console = (window.console = window.console || {});

    while (length--) {
        method = methods[length];

        // Only stub undefined methods.
        if (!console[method]) {
            console[method] = noop;
        }
    }
}());

if (window.console && 'function' === typeof window.console.log) {
    window.console.log(o);
}

下面是一个版本，当开发人员工具打开而不是关闭时，它将登录到控制台。

(function(window) {

   var console = {};
   console.log = function() {
      if (window.console && (typeof window.console.log === 'function' || typeof window.console.log === 'object')) {
         window.console.log.apply(window, arguments);
      }
   }

   // Rest of your application here

})(window)

console.log只有在打开开发人员工具(F12来切换它的打开和关闭)后才可用。 有趣的是，在你打开它之后，你可以关闭它，然后仍然通过console.log调用发布到它，这些将在你重新打开它时看到。 我认为这是一个bug，可能会被修复，但我们将拭目以待。

我可能会用这样的东西:

function trace(s) {
  if ('console' in self && 'log' in console) console.log(s)
  // the line below you might want to comment out, so it dies silent
  // but nice for seeing when the console is available or not.
  else alert(s)
}

更简单的是:

function trace(s) {
  try { console.log(s) } catch (e) { alert(s) }
}